What are some common do’s and don'ts when it comes to rehabilitating a building?

Roofs: Though some wood shingles are the most common historic roofing material, less expensive asphalt shingles are an acceptable replacement. If you choose to invest in wood shingles, use the more historically accurate, thinner sawn shingles rather than the heavy, split shake shingles. Avoid clay tile, aluminum shingles, and other metal roofing materials that are not compatible with the architectural style or age of your building.

Avoid adding dormer windows to the front of your house; they are much less intrusive on the rear roof slope and even on the sides. Exterior Walls: Never sandblast to clean or remove paint from brick walls; use appropriate chemical cleaners and low pressure (400 psi) wash instead. Sandblasting and high-pressure washes permanently damage the protective outer layer of the brick.

Always clean small test patches first in order to determine the gentlest effective method. Repoint deteriorated mortar joints with a softer, high-lime content mortar rather than ... more.

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